Rolled-sheet-metal piling



June 30, I925. 1,543,676

. I J. LINDENLAUF ROLLED SHEET METAL FILING Filed Feb. 12, 1924 '2 Sheets-Sheet 1 I NVENTOR J. LINDENLAUF ROLLED SHEET METAL FILING June 30, 1925.

Filed Feb. 12, 1924 2 Sheets-Sheet 2 o /VENT R w Patented June' 30, 1925.

f UNITED (STATES.

PATENT OFFICE.

JOSEPH LINDENLAUF, OF PITTSBURQH, PEIFNSYLVANIA, A-SSIGNOR OF THREE- EIGHTHS TO HERMAN STRATMAN AND TWO-EIGHTHS TO HARVEY 'M. ARON- SON, BOTH OF PITTSBURGH, PENNSYLVANIA.

BOLLED-SHEET-METAL Prune.

Application filed February 12, 1924. Serial No. 692,300.

To all whom it may concern: 4

Be it known that I, JosErH LINDE-NLAUF, a citizen of Germany, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have made a new and useful invention in Improvements in a Rolled-Sheet-Metal Piling, of which the following is a specification.

The invention relates to interlocking metal sheet piling for use in cofi'er-dams, retaining, subfoundations and the like. It has for its principal objects, the provision of an improved piling of the type specified; (1) having a lock joint of very simple form, which can be readily formed in the rolling operation, and which will greatly assist in securing and maintaining perfect alignment of the finished wall; (2) in which the joint will have a minimum amount of clearance and yet permit the easy driving of the piles; (3) and in which the pilin units are shaped so as to give a finished wa l havi'ng a maximum degree of strength for resisting lateral pressure, thus particularly adaptm the construction for retainin walls. C ertain embodiments of the invention are illustrated in the accompanying drawings wherein: W

Figures 1, 2, 3, 4, 5 and 6 are end views showing dilferent forms of the construction.

Referring to the construction of Fig. 1, the numerals 1, 2 and 3 represent three pile members forming a part of a wall, such parts being similar and having the longitudinal axis of the sections, (which is also the neutral axis) at the line A-A with the distances B and equal. Each of the piles has two legs or sides 4 and forming (roughly speaking) an L, the angle as between the two sides and their relative length being varied to suit requirements, and convenience in rolling. These piles are formed by the usual rolling operation between a series of rolls.

The two edges of the pile. are similarly formed, substantially as indicated in the drawing, each comprising a tongue 6 and a hook 7 extending in opposite directions, preferably at right angles to the longitudinal axis A-A of the pile section, and with the inner face of the hook portion curved to provide a recess which corresponds in contour to that of the tongue of the adjacent pile which fits in it. There is thus at each joint 'two' similar tongues and two similar. receiving recesses, with the tongues fitting in the recesses with just suflicient clearance to permit the ready movement of the edges along each other in interfitting relation when the piles are driven. The line of contact. 8 between the sections at the endsis in the form of a continuous reverse curve approximately the letter S with the central portion 9 of the S diagonally directed with respect to longitudinal axis A-A of the section.

The form of joint as just described may be easily formed by a rolling and bending operation and gives a very secure connection. A large bearing is afforded along the S shaped line of contact and the lost motion here is. slight so that there is little give to the construction longitudinally of the Wall. There is also little opportunity for rocking movement at the joints so that the wall at the joints is relatively resistant to lateral deflection.

The L section of the pile is also of advantage in giving a very stiff wall against lateral pressure, this being especially desirable where the pilin is employed as a retainin wall. The wal gives a large moment 0 resistance in proportion to the weight of metal employed because of the large proportion of the section located at a maximum distance laterally from the neutral axis AA, the extra metal in the edges contributing to vthis eflect.

Fig. 2 illustrates a modification designed for use where a wall of less lateral strength than that of the Fig. 1 construction is required. The webs 10 of the piles are in this case straight, the joints 11 and 12 at the edges being similar to those just described in the Fig. 1 construction. In rollingthe sections, the hooks 7 are rolled so that they lie at right angles to the webs 10, and are then bent to the form illustrated. This also 2112- plies to the forming of this joint in the various modifications of the structure.

Fig. 3 illustrates a further modification, in which the joints at 13, 14 and 15 are the same as in the other constructions, but the body portions 16, 16, 16 of the piles, are of 2 form (roughly speaking), the advantages as to the stiffness of the wall formed being similar to those set forth with respect to the Fig. 1 construction.

Fig. 4 shows another construction in construction having, however, a modified form of joint, including the tongues 17 and 18 and the hooks l9 and 20 with the space 21 for packing in case it is desired to make the wall water tight. The joint in certain other respects resembles that of Fig. 1, the tongue and recess at each edge lying in substantial alignment on a line Z-Z at right angles to the longitudinal axis AA of the pile sections as in the Fig. 1 construction, and the line of contact between the edge sections corresponding in contour to the letter S.

Fig. 5 also illustrates a modification of the Fig. 1 construction in which the L form of cross section is used. The joints 22 and 23 between the sections 24, 25 and 26 are similar in general design and principle to those of Fig. 1.

Fig. 6 shows another joint similar to those heretofore'described except that the two packing recesses 27 and 28 are employed. Each section 29 and 30 has a tongue joint.

31 and a hook 32 as in the other form of What I claim is:

A wall consisting of a plurality of similar piles comprising integral rolled sections arranged with their neutral axes in alignment and each having its two edges similarly formed and each comprising a tongue and a-hookextending in opposite directions from the neutral axis of the pile, a recess being provided on the inner side of the hook in alignment with said tongue and having a shape similar to that of the tongue, the said edges of adjacent sections interlocking, sa as to prevent turning about such edges, and the said tongues being of approximately uniform thickness throughout with their ends rounded, and the center lines of the tongues of each interlocking pair of edges being in alignment and at right angles to the neutral axes of the piles.

In testimony whereof, I have hereunto subscribed my name this 9th day of February, 1924.

. JOSEPH LINDENLAUF. 

